"""
* | File        :	  epd7in5.py
* | Author      :   Waveshare team
* | Function    :   Electronic paper driver
* | Info        :
*----------------
* | This version:   V4.0
* | Date        :   2019-06-20
# | Info        :   python demo
-----------------------------------------------------------------------------
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documnetation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to  whom the Software is
furished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""

import logging

from inkycal.display.drivers import epdconfig

# Display resolution
EPD_WIDTH = 800
EPD_HEIGHT = 480

logger = logging.getLogger(__name__)


class EPD:
    def __init__(self):
        self.reset_pin = epdconfig.RST_PIN
        self.dc_pin = epdconfig.DC_PIN
        self.busy_pin = epdconfig.BUSY_PIN
        self.cs_pin = epdconfig.CS_PIN
        self.width = EPD_WIDTH
        self.height = EPD_HEIGHT

    # Hardware reset
    def reset(self):
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20)
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(2)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20)

    def send_command(self, command):
        epdconfig.digital_write(self.dc_pin, 0)
        epdconfig.digital_write(self.cs_pin, 0)
        epdconfig.spi_writebyte([command])
        epdconfig.digital_write(self.cs_pin, 1)

    def send_data(self, data):
        epdconfig.digital_write(self.dc_pin, 1)
        epdconfig.digital_write(self.cs_pin, 0)
        epdconfig.spi_writebyte([data])
        epdconfig.digital_write(self.cs_pin, 1)

    def send_data2(self, data):
        epdconfig.digital_write(self.dc_pin, 1)
        epdconfig.digital_write(self.cs_pin, 0)
        epdconfig.SPI.writebytes2(data)
        epdconfig.digital_write(self.cs_pin, 1)

    def ReadBusy(self):
        logger.debug("e-Paper busy")
        self.send_command(0x71)
        busy = epdconfig.digital_read(self.busy_pin)
        while (busy == 0):
            self.send_command(0x71)
            busy = epdconfig.digital_read(self.busy_pin)
        epdconfig.delay_ms(20)
        logger.debug("e-Paper busy release")

    def init(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()

        self.send_command(0x06)  # btst
        self.send_data(0x17)
        self.send_data(0x17)
        self.send_data(0x28)  # If an exception is displayed, try using 0x38
        self.send_data(0x17)

        self.send_command(0x01)  # POWER SETTING
        self.send_data(0x07)
        self.send_data(0x07)  # VGH=20V,VGL=-20V
        self.send_data(0x3f)  # VDH=15V
        self.send_data(0x3f)  # VDL=-15V

        self.send_command(0x04)  # POWER ON
        epdconfig.delay_ms(100)
        self.ReadBusy()

        self.send_command(0X00)  # PANNEL SETTING
        self.send_data(0x1F)  # KW-3f   KWR-2F	BWROTP 0f	BWOTP 1f

        self.send_command(0x61)  # tres
        self.send_data(0x03)  # source 800
        self.send_data(0x20)
        self.send_data(0x01)  # gate 480
        self.send_data(0xE0)

        self.send_command(0X15)
        self.send_data(0x00)

        self.send_command(0X50)  # VCOM AND DATA INTERVAL SETTING
        self.send_data(0x10)
        self.send_data(0x07)

        self.send_command(0X60)  # TCON SETTING
        self.send_data(0x22)

        # EPD hardware init end
        return 0

    def getbuffer(self, image):
        img = image
        imwidth, imheight = img.size
        if (imwidth == self.width and imheight == self.height):
            img = img.convert('1')
        elif (imwidth == self.height and imheight == self.width):
            # image has correct dimensions, but needs to be rotated
            img = img.rotate(90, expand=True).convert('1')
        else:
            logger.warning("Wrong image dimensions: must be " + str(self.width) + "x" + str(self.height))
            # return a blank buffer
            return [0x00] * (int(self.width / 8) * self.height)

        buf = bytearray(img.tobytes('raw'))
        # The bytes need to be inverted, because in the PIL world 0=black and 1=white, but
        # in the e-paper world 0=white and 1=black.
        for i in range(len(buf)):
            buf[i] ^= 0xFF
        return buf

    def display(self, image):
        self.send_command(0x13)
        self.send_data2(image)

        self.send_command(0x12)
        epdconfig.delay_ms(100)
        self.ReadBusy()

    def Clear(self):
        buf = [0x00] * (int(self.width / 8) * self.height)
        self.send_command(0x10)
        self.send_data2(buf)
        self.send_command(0x13)
        self.send_data2(buf)
        self.send_command(0x12)
        epdconfig.delay_ms(100)
        self.ReadBusy()

    def sleep(self):
        self.send_command(0x02)  # POWER_OFF
        self.ReadBusy()

        self.send_command(0x07)  # DEEP_SLEEP
        self.send_data(0XA5)

        epdconfig.delay_ms(2000)
        epdconfig.module_exit()
### END OF FILE ###
